1222161 has 8 divisors (see below), whose sum is σ = 1636800. Its totient is φ = 811152.

The previous prime is 1222159. The next prime is 1222171. The reversal of 1222161 is 1612221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1222161 - 2¹ = 1222159 is a prime.

1222161 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1222161.

It is not an unprimeable number, because it can be changed into a prime (1222171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15 + ... + 1563.

It is an arithmetic number, because the mean of its divisors is an integer number (204600).

2^1222161 is an apocalyptic number.

It is an amenable number.

1222161 is a deficient number, since it is larger than the sum of its proper divisors (414639).

1222161 is a wasteful number, since it uses less digits than its factorization.

1222161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1815.

The product of its digits is 48, while the sum is 15.

The square root of 1222161 is about 1105.5139076466. The cubic root of 1222161 is about 106.9160257666.

Adding to 1222161 its reverse (1612221), we get a palindrome (2834382).

The spelling of 1222161 in words is "one million, two hundred twenty-two thousand, one hundred sixty-one".